1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46858d26417f96ba83b9805e353e5842886a2ceb52d16396a677e46f61fa25a4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f97be93c-fbac-451f-b867-1596b9f6100c.json and https://artists.proofprofile.net/proofs/artist/f97be93c-fbac-451f-b867-1596b9f6100c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a70441a4c30788728320aaf89112e388d85f27e91356ffdbdfc45ddd23b35f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0300600762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc58f274f4e6f3b79b11a24e640ba8451afbf7c1aed25137c2cb6599606a050. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1710600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022d54e6d4e41d1205f07124f17e9407ba3d46bb233877f4bbe656977bcb1c6b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1670600074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e3e46f69f83bf83b0b16546c2fbea03b8847b535d3801b8621a01b2208c4ee. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1710600062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3112e16abcdf2805c136694f1860a406d987330d6cb940256b9ed09e271ef86. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:06:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR9911301546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7089e31ce1d5ccde8715d114a56db297c7b3eccd941bac7ffc0ca06c36af09ea. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR9911301550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a2e54437e698e9ee14eb09efb2c4d1ff1bc1f20762bb5915ff0a80cb6345ac. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR9911301551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f03ee11a182e613f94e2fbabec91ccc646ebec04e2aa48b48ebfce4f885643d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR9911301552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c761a2e413ec12ba7c74a0a448494c228a7a6bbf1d448567865c2d1e82f027. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR9911301554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a015f4fab6df68aee721316e2135b1290b44bb333786c3176fbcadc6df1e14b. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1710600076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72b94134927b93bd03eff227964d8117f931e3599f960d69be635016ac60c6a. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1710600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74614617cf89930eaf57b61ada4e9cdb705522bc31615c5b2ce38b9f6a24c772. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1710600036.